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Posted to user@hbase.apache.org by y_...@tsmc.com on 2010/03/24 02:02:23 UTC
The occasion to add region server
Hi,
Our cluster with 20 machines(4 core, 12G Ram, 1U server)
HBase Version 0.20.2, r834515
--------------------------------------------
ZK : 3
DataNode : 20
Total Region : 2088
Region Server : 10 <<--
Client Connection: 20
My job took time : 1264 sec
--------------------------------------------
ZK : 3
DataNode : 20
Total Region : 2088
Region Server : 15 <<--
Client Connection: 20
My job took time : 1257 sec
--------------------------------------------
ZK : 3
DataNode : 20
Total Region : 2088
Region Server : 20 <<--
Client Connection: 20
My job took time : 1267 sec
According to the above result, it didn't get the performance enhance after
adding region servers.
why?
I wonder when is the best occasion to add extra region server.
In my machine's spec ,maybe a region server will always get a good
performance with regions under 300.
Any ideas, thanks.
Fleming Chiu(邱宏明)
707-6128
y_823910@tsmc.com
週一無肉日吃素救地球(Meat Free Monday Taiwan)
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Re: The occasion to add region server
Posted by Stack <sa...@gmail.com>.
You saw no difference. Before starting job all regionservers had equal
amount of regions. Were regionservers loaded while the job ran. Try
with 5 regionservers. If same for sure something is of.
On Mar 23, 2010, at 6:02 PM, y_823910@tsmc.com wrote:
> Hi,
> Our cluster with 20 machines(4 core, 12G Ram, 1U server)
> HBase Version 0.20.2, r834515
> --------------------------------------------
> ZK : 3
> DataNode : 20
> Total Region : 2088
> Region Server : 10 <<--
> Client Connection: 20
> My job took time : 1264 sec
> --------------------------------------------
> ZK : 3
> DataNode : 20
> Total Region : 2088
> Region Server : 15 <<--
> Client Connection: 20
> My job took time : 1257 sec
> --------------------------------------------
> ZK : 3
> DataNode : 20
> Total Region : 2088
> Region Server : 20 <<--
> Client Connection: 20
> My job took time : 1267 sec
>
> According to the above result, it didn't get the performance enhance
> after
> adding region servers.
> why?
> I wonder when is the best occasion to add extra region server.
> In my machine's spec ,maybe a region server will always get a good
> performance with regions under 300.
> Any ideas, thanks.
>
>
>
>
> Fleming Chiu(邱宏明)
> 707-6128
> y_823910@tsmc.com
> 週一無肉日吃素救地球(Meat Free Monday Taiwan)
>
>
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> TSMC PROPERTY
> This email communication (and any attachments) is proprietary
> information
> for the sole use of its
> intended recipient. Any unauthorized review, use or distribution by
> anyone
> other than the intended
> recipient is strictly prohibited. If you are not the intended
> recipient,
> please notify the sender by
> replying to this email, and then delete this email and any copies of
> it
> immediately. Thank you.
> ---
> ---
> ---------------------------------------------------------------------
>
>
>